Format

Send to

Choose Destination
J Opt Soc Am A Opt Image Sci Vis. 1996 Nov;13(11):2135-40.

Spatial pooling of contrast in contrast gain control.

Author information

1
Department of Cognitive Sciences, University of California, Irvine 92697, USA.

Abstract

We report psychophysical measurements of spatial pooling functions for contrast gain control. We use a nulling technique to measure the dependence of contrast induction on the spatial frequency of a sinusoidal contrast modulation. This dependence on spatial frequency, when transformed, provides the profile of a spatial pooling function. The measured profiles are fitted well by Gaussians. We confirm earlier results that the area over which spatial pooling takes place depends on the scale of the modulated pattern. We also find that pooling functions are similar for achromatic and isoluminant stimuli.

PMID:
8888606
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Optical Society of America
Loading ...
Support Center